The object in the sentence
"Eighty-six forty-five."
refers to the 45th president of the US, as in Bush 41 vs. Bush 43.
The meaning of the verb eighty-six – eject, bar, reject, discard, cancel (Google) – has been addressed in several answers here (e.g. 1, 2, 3, 4).
Should forty-five be capitalized? Is it a proper noun?